US National Arboretum


Arboretum Plant Photo Gallery
Answer to the Front Page Picture of the Week Question
for October 12th - October 22nd, 2006

Picture of Iris tectorum.  Click here for a larger image.
This is Japanese roof iris, Iris tectorum.

Although it is naturalized in Japan, it is native to China, where it was planted in thatch roofs to help bind them against strong wind. It is one of the most shade tolerant of all irises. Iris tectorum is an example of the great diversity of exotic Iris species coming into the nursery industry. Flowers appear in late spring and come in lavender, blue, or white. You can grow Japanese roof iris in moist well drained soil, for example, around ponds and fountains, and is hardy in USDA Hardiness Zones 4 through 9. You can find it growing in the Japanese Woodland in the Asian Collections.

[Click on the picture to see a larger image].
Be sure to go to the Picture of the Week Archive
or see the links below to view other plant images in our various Photo Galleries.

Go to:
Amaryllis (Hippeastrum) Photo Gallery
Award Winning Daylilies Photo Gallery
U.S. National Arboretum Crapemyrtle Introductions Photo Gallery
Glenn Dale Azaleas Photo Gallery
Fall Foliage Photo Gallery
Photo Gallery Introduction

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Last Updated   October 12, 2006 2:10 PM

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